<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>event</title>
<script type="text/javascript">
	//借助window.onload事件,在这个页面加载完成后执行程序代码
	window.onload = function(){
		
	};
</script>
</head>
<body>
	<button id="btnId">SayHello</button>
</body>
</html>